Description
The Liya Test Automatic Cement Compression and Flexure Machine have been designed for testing the flexure of the mortar prisms 40x40x160 mm
and the compression on the 40x40mm pieces of prisms after the flexure test or 50×50 mm and 70,7 mm mortar cubes.
The Automatic Cement Compression and Flexure Machine also meet the requirements of CE norms for safety and health of the operator.
Compression and flexure jigs, distance pieces, and also removable transparent front-rear safety doors (should be factory installed) should be ordered separately.
The Automatic Cement Compression and Flexure Testing Machines allow less experienced operators to perform the tests. The only required operations are;
* Setting test parameters, including pace rate
* Choosing the compression or flexure frame by using valve.
* Choosing Capacity of the frame (to call calibration values of the required load cell)
* Use load cell switch frame or compression side (up/down)
* Pressing the START button on the control unit.
* The machine automatically starts the rapid approach; switches the test speed after 1% of the load capacity of the machine and stops once the specimen failure.
The Automatic Cement Compression and Flexural Testing Machines consist of;
Very rigid two column single or double chamber Load Frames,
Automatic Hydraulic Power Pack,
Digital data acquisition & control system.
Cement Compresion & Flexural Load Frames
15 kN and 250 kN high quality load cells are used on frames to provide high accuracy in load measuring. Both frames are fitted with round platens with Ø 165 mm and these should be used together with suitable flexure and compression jigs.
Distance Pieces
Due to the modular design of the frames any sample with suitable size, load and pace rate can be test on both chambers by decreasing the distance between platens.
Upper Platens
Manufactured from high quality steel which is hardened (more than HRC 53), smoothed and finished.
The roughness value for the surface texture of machine and auxiliary platens are 3,2 μm. the movable design.
Loading Cylinder Assembly & Limit Switch
Digital graphic display unit loading rate of the time of testing and load values can be monitored.
Software
All frames have a single acting up stroking ram. The diameter of piston changes with regard to the capacity.
The maximum ram stroke is 50 mm, a limit switch is fitted to prevent over travel of the ram which cuts the power to the pump.
There is a low friction coaxial PTFE seal between the cylinder and the piston fitted to the cylinder.
HYDRAULIC POWER PACK AND DIGITAL DATA ACQUISITION & CONTROL SYSTEM
Hydraulic Power Pack
Automatic Hydraulic Power Pack, dual stage, controlled by digital readout and control unit is designed to supply the required oil to the load frames for loading. Very silent power pack can load the specimen between 0,05 to 2.4 kN/sec with an accuracy of ±5%. A Rapid approach pump is supplied as standard. Safety valve (maximum pressure valve) is used to avoid machine overloading.
Dual Stage Pump
The dual stage pump is formed by two groups;
* Low pressure gear pump
* High pressure radial piston pump
On the dual stage pump, a high delivery, low pressure gear pump is used for rapid approach, while a low delivery, high pressure radial piston pump is used for test execution. The rapid approach facility shortens the time interval from piston start until the upper platen touches to the specimen. This excellent feature helps to save a lot of time when a large number of specimens are going to be tested.
Motor
The motor which drives the dual pumps in an AC motor and it is controlled by motor inverter. The variation in the oil flow is executed with the variation of the rotation speed of the motor.
Maximum capacity is 400 bar
Distribution Block
A distribution block is used to control the oil flow direction supplied by the dual stage pump, the following parts are fitted to the distribution block; Solenoid valve, Safety valve (max. pressure valve), Transducer, Low pressure gear pump and High pressure radial piston pump.
Oil Tank
The tank includes enough oil to fill the mechanism which pushes the ram during the test. The level and oil temperature can be seen on the indicator fitted to the tank. It has 25 L capacity. Hydraulic motor oil, number 46, must be used.
Digital Data Acquisition & Control System
Control Unit, designed to control the automatic compression/flexure testing machines for compression, flexure, splitting tensile strength tests of construction materials such as concrete, cement mortar, masonry units/blocks.
All the operations of Control Unit are controlled from the front panel color resistive touch screen display and function keys. The unit can be configured as using for two frames.
The Control Unit has easy to use menu options. It displays all menu option listings simultaneously, allowing the operator to access the required option in a seamless manner to activate the option or enter a numeric value to set the test parameters. Its specimen setting sub-menu lists different specimen types including but not limited to cube, cylinder, block, beam, beam double upper bearers, cube splitting tensile, cylinder splitting tensile, paving block splitting tensile and kerb flexure. Digital graphic display of the unit is able to draw real-time “Load vs. Time” or “Stress vs. Time” graphics.
Unit offers many addition unique features.Thanks to its built-in internet protocol suite, every aspect of the device can be controlled remotely from anywhere around the world.
Following tests can be perform by on control unit ( also with appropriate hydraulic power pack, testing frame and accessories);
- Compressive Strength of Concrete Cylinders / Cubes
- Flexural Strength of Concrete Beams
- Flexural Strength of Concrete Kerbs
- Tensile Splitting Strength of Concrete Cylinders / Cubes
- Tensile Splitting Strength of Concrete Paving Blocks
- Compressive Strength of Masonry Units/Blocks
- Flexural Strength of Concrete Flagstones/Slabs
- Compressive Strength of Hydraulic-Cement Mortars
- Flexural Strength of Hydraulic-Cement Mortars
Lıya digital control unit is a unique device designed for Universal Hydrolic, Electric and Pneumatic testing systems. TMC742 contains all the electronic components and software to measure directly load, pressure, displacement, force, strain and so on. TMC742 two-axis controller is equipped with many unmatched skills to control static and dynamic systems.
All the operations of digital readout unit are controlled from the front panel via 7” 800×480 pixel 18 bit color TFT LCD with resistive touch screen display. TFT LCD is also used to display graphical actions of active test (real time).
Digital readout unit is equiped with many sub menus to easily interact with the user such as Calibration (up to 12 points), Standart sample selection, User defined sample entry,Test and control parameters, Report Operations, etc.
Digital readout unit makes the test according displacement, load or pressure with using advanced adaptive PID algorithms upto 1000 loops/second.
Dispalcement control resolution 0.001 mm/minute
Memory capacity is to store test results up to 4000 records .
Indepent selection of transducers for each channel.
Software
Sample, company, laboratory and test values can be entered in the programme.
Load-time graphic, test reports and sample reports can be taken.
Software provides test data, results, and the load-time graphs can be seen at LCD screen.
The Automatic Compression Machine can be controlled from a computer with the software free of charge. This software provides data acquisition and management for compression, tensile and splitting tensile test throughout the test execution. The advanced functions for data base management provide an easy navigation of all saved data. The test results certificate includes all descriptive information. Therefore, test parameters can be set and details about the test carried out such as client details, test type, specimen type, user info and other information required can be entered and printed out as well as test report and graph.
Software can be performed in Turkish and English.
Test results, graphics and properties of 24 different specimens can be saved in one folder. Old test folders can be reviewed.
User can highlight all 12 different specimen curves in different colors on the graphics.
Frequently used information like name and location of the laboratory, type and dimensions of mostly used specimens are held in memory and can be written automatically by right clicking on information boxes and selecting frequently used text in menu.
User can access any data of previously completed tests and use in his/ her new report since most of the tests have same structure and properties.
Main Features
- Pace rate control from 1 kN/sec to 20 kN/sec depending on piston size.
- Can control 2 frames (optional)
- Can make test with load control.
- Real time display of test graph.
- Analog channels for different frame load cells
- RS-232 serial port connecting for computer interface
- LCD display
- 2 different unit system selection; kN and kgf
- Multi-language support (English and Turkish)
- 2 different unit system selection; SI and Metric
- Real-time clock and date
- Free of charge PC software for the test control and printout the test report.
